Thunderbird 0.6 through 0.9 and Mozilla 1.7 through 1.7.3 does not obey the network.cookie.disableCookieForMailNews preference, which could allow remote attackers to bypass the user's intended privacy and security policy by using cookies in e-mail messages.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11407
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A100047
https://exchange.xforce.ibmcloud.com/vulnerabilities/19172
https://bugzilla.mozilla.org/show_bug.cgi?id=268107
http://www.securityfocus.com/bid/12407
http://www.redhat.com/support/errata/RHSA-2005-335.html
http://www.redhat.com/support/errata/RHSA-2005-323.html
http://www.redhat.com/support/errata/RHSA-2005-094.html
http://www.novell.com/linux/security/advisories/2006_04_25.html